Explain why iron, cobalt, and nickel are not in the same group of elements
2 answers:
Actually, iron, cobalt, and nickel ARE all in the same group of elements. If you look on this attachment, you will see iron, nickel, and cobalt are all medals. I circled it for you.
Answer:
First, remember the distribution of the groups and the periods in the periodic table (see attached file)
The group is observed vertically throughout the table
And the period is observed horizontally throughout the table
As we can see in the table (see attached file), iron, cobalt and nickel are located next to each other horizontally so they belong to the same period and not to the same group
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Answer:
The volume of an aluminum cube is 0.212 cm³.
Explanation:
Given that,
Edge of cube = 4.00 cm
Initial temperature = 19.0°C
Final temperature = 67.0°C
linear expansion coefficient
We need to calculate the volume expansion coefficient
Using formula of volume expansion coefficient
Put the value into the formula
We need to calculate the volume
The change temperature of the cube is
Put the value into the formula
We need to calculate the increases volume
Using formula of increases volume
Put the value into the formula
Hence, The volume of an aluminum cube is 0.212 cm³.